Question

at t=0 ,seconds a car has a speed of 30m/s. After 6seconds, its speed is 15m/s. what is the average acceleration of tge car? How far does it travel in this time?

Answer 1

Accelaration is defined as the rate of change of velocity

Accelaration = Change in velocity/change in time

Change in velocity = 15 - 30 = - 15m/s

Change in time = 6 - 0 = 6 seconds

Acceleration = - 15/6 = - 2.5 m/s^2

Distance = speed * time

Distance = 15 * 6 = 90m